fix: hide native browser reveal toggles on password inputs

[simranbali-ace04]

Description

On the Login and Signup pages, there's a layout clash where modern browsers (like Edge and Chrome) force-render their native credential reveal toggles inside password fields. This results in two eye icons showing up simultaneously, causing layout overlapping and clipping inside the input wrapper. This PR overrides those default browser graphics to keep the UI clean and uniform.

Related Issue

Closes #339

Changes Made

• Targeted browser-specific pseudo-elements (::-ms-reveal, ::-ms-clear, and webkit password toggles) globally in frontend/src/index.css.
• Set their display properties to none to prevent forced native icons from breaking our custom Lucide-react buttons.

Screenshots

Checklist

• I have read CONTRIBUTING.md
• My branch follows the naming convention
• I have tested this locally
• Linting passes (npm run lint in frontend/)
• No unrelated files were modified
• Screenshots are attached

[simranbali-ace04]

Hey @aryandas2911 , I have added this PR and fixed this assigned issue . Kindly review the PR.